Required: The Cash Receipt table below contains seven attributes. Which of those could possibly be foreign keys? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.) Cash Receipt: Check # Amount Remittance Advice # Date Customer # Invoice # Cashier #